Home / 21,339.17-29,443.66-12,262.78

Finding the Fourth Proportional to 21,339.17, 29,443.66 and 12,262.78

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Solution

The fourth proportional to 21,339.17, 29,443.66 and 12,262.78 is: 16,920.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,339.17 : 29,443.66 = 12,262.78 : x
  2. Step 2: Convert to fraction form
    21,339.17/29,443.66 = 12,262.78/x
  3. Step 3: Cross multiply
    21,339.17x = 29,443.66 × 12,262.78
  4. Step 4: Simplify right side
    21,339.17x = 361,061,124.97
  5. Step 5: Solve for x
    x = 361,061,124.97/21,339.17
  6. Step 6: Final answer
    x = 16,920.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.